Hi,
The panel should work fine if the displays are configured as a single wide desktop in the system (so that when used in fullscreen mode, the panel would span both screens), when used with a wide panel module like B58_wide or B58_full.
I'm interested in how well RPi4 with 2 displays will work with SimVimPanel, as it seems like a good option for it, but I don't know yet if there are any difficulties in configuring the screens that way with RPi4 (as a single wide-resolution desktop).
- Roman